Frame



Dec. 29 1925- 7 1,567,299

T. RICHTER FRAME Filed Feb. 13, 1924 2 Sheets-Sheet 1 lm/enfo'r:

Dec. 29, i925- 1,567,299

T. RICHTER FRAME Filed Feb. 13, 1924 2 Sheets-She et 2 Inventor:

. Theodor Rich/er.

hu s.

Patented Dec. 29, 1925.

UNITED STATES THEODOR RICHTER, OF SPANDAU, GERMANY.

FRAME.

Application filed February 13, 1924. Serial No. 692,619.

T 0 all whom it may concern:

Be it known that I, THEODOR RICHTER, a citizen of the German Republic, residing at Spandau, Germany, have invented certain new and useful Improvements in Frames, of which the following is a specification.

Frames for mowing and binding machines, forming the subject of the invention and having four main members assembled in pairs, are characterized accord ing to this invention in that said members are each formed of a single piece pressed to U-shape and as far as possible of uniform strength throughout its length in respect to the stresses to be carried by it, said members being placed on edge, and whereof the members lying parallel to the working direction of the machine are provided with pressed out bearing portions for the main driving shaft of the machine mechanism, while their ends engage exactly into the cross sectional form of the other members. The provision of members of uniform strength throughout their length in respect to the stresses to be carried thereby, is secured by making said members relatively f wide at their intermediate portions and tapering them substantially, uniformly toward their ends.

The invention further provides that the member carrying the pull when the machine is working is formed integrally with the draw-eye, and is so arranged that the pull comes on substantially in the plane of this member.

By the new construction the number of parts and their connections is reduced to a minimum, whereby in combination with the crosssectional form of the members and. the use of one and the same material of corn struction the frame possesses extraordinary strength and light weight, while the low cost and high speed of production for the frames of these machines have not previously been approached. It therefore precisely meets the requirements of the frames of mowing and binding machines, namely, to provide a strong base for the machine but with the least possible weight in all the construction elements and yet so that no stress on the machine in use shall effect a permanent strain.

The usual construction of frames, such as in bridge building, only partially fulfills these requirements in that the main members are built up of several separate parts of different kinds of material secured together by rivets, bolts and the like. These connections produce the inaccuracies customary in the construction of clumsy machines, and affect to great disadvantage the stiffness and length of serviceable life of frames on which are thrown heavy and varied demands.

By this invention deficiencies of the kind mentioned are. obviated on account of the single-piece main members. This integral construction also renders possible a very economical mass production of the frames, since for binders of all sizes with the same form frames may be produced whereof the ends of the longitudinal members at least may be given the size of section suited to any case in question by suitably trimming up the length, so as to fit very accurately the adjoining channel section. The known construction on the other hand requires a specially produced frame for each machine.

It is also important that the bearing portions pressed out in the members lying in the direction of the machine when working enable a firm and vibration-free seating of the main driving shaft, so that a reliable driving of the various usual mechanisms such as the cutting, binding and conveying devices of the machine from this shaft is assured.

The accompanying drawing shows an ex-- ample of frame according to the invention, Figure 1 showing the frame in perspective; Fig. 2 a detail of construction to an enlarged scale, and Fig. 3 the frame as seen from the side remote from the blades, the wheels be ing indicated in the working position of the machine by dot and dash lines.

The parallel main members a, a" are each pressed in a single piece to a U-shaped crosssection and placed on edge. They lie transverse to the working direction of the machine and constitute the two longitudinal members in relation to the shape of the frame. In their inwardly facing channels they take the ends of the cross members (2 and (Z arranged at right angles thereto and in the working direction of the machine, these also being pressed in one piece from sheet metal.

Moreover all the members are of regular form and dimensioned so that the strength at any section is substantially proportional to the stresses ordinarily incurred there in IUU t g 1S4 practice. The frame may thus be described as a body of uniform strength. The cross members I), 0 terminate inrectangularly formed enlargements cl so that a connection of the longitudinal and cross members of the frame which will rigidly resist forces in all directions can be effected without the help of separate gussets or the like.

The main wheel Z shown in dot and dash lines in Fig. 3 is carried by cross members I), c and in order to take the bearings of the main shaft it which is driven from the main wheel Z on rotation thereof, bearing portions 0 are pressed into the cross iiiem'bers Z), c,

the linersoi"bearing proper i being inserted directly into said bearing portions. Also the draw-eye which carriestl'ie pullwhen the in miliine is working is formedintegrally with the inner cross member 0, so thatthe entire frame including the most important appendages is formed of only four main construction members, and h'as asimplicity and trength not hitherto achieved. If desired the number of parts may be further reduced: for example by making the parts a, b and a integral the frame will consist of only two parts. I

An essentialfeature of my invention consists in inaliingtli'e main parser the frame in the manner herein de'Scribedfso that the above-mentioned "at-ivarimges of strength and rigidity, saving of material, reduction of weight aswell as simplicity of construction will result. Instead of the flanges gshown in Fig. 1, for instance, also elevatedor depressed s'urfaces may be pressed into the members.

I claim: p p

1. As an articleof inanufacture aframe for a mowing and binding machine consisting of four main members of pressed'inetal shaped to a channel or U form in cross section and made relatively wide atinterin-ediate portions thereofand being substantially uniformly 'tapered'toward their ends to thereby render then'i'ofnniforin strength throughout their length, without excess weight, with respect 'to the loads to be carried, all of said members haiingtheir web portions i' ertically and their flange portions, horizontally disposed, two of said members being materially longer tlian'the others and being disposed transversely er the line of travel of the frame when in use, with'their open sides inward and the other two of said members being disposed adjacent each other and toward the same end of the "first named members with the terminal ends of one of said members and one end of the "other of ried, all'of said members having their web portions vertically and their flange portions,

horizontallydisposed, two of said'me'nibeis being materially longer-than the others and being disposed transversely of the line of travel of the frame when inuse with their open sides inward and the other two ofsaid members being disposed adjacent each other and toward the same end of the first named mcmbersthe flanges at the ends of the last named members being materially widened *and said ends being of "hon-like, closed formation, said ends being snugly'interfitted and secured by suitable fastenings "in the open si'desof the first named members.

3. As an article ofmanufacture aframe for a mowing and binding machine consisting of four mainmembers' of pressed metal shaped to a channel or U forin-i-n'cross section and made relatively wide at intermediate portions thereof and being substantially uniformly tapered toward their ends to thereby render them of uniform strength throughout their length without excess weight, with respect to the-loads'to be carr'ied, all of said members having their web portions vertically and their flange portions, horizontally disposech'two 'of said i'neiiibers being inaterially'longer than the others" and being disposed transversely of the line of travel of the frame when in use with their open sides inward and the other two "of said members being disposed ad acent-e'ach other and toward the same end of thefirst named members the'in'terfittedxen'es of the last "named members being widened and of 'box -like, closed formation, said endsbeing snugly interfitted' and securedin the 'ope'n sides of the firstfn'an'ied"members,therer'n'aining end of one of the last named-members'being pressed into the-form of an integral open draw eye which embraces tlie first named -inei'n'ber, perpendicular"thereto.

In testimony whereof I have hereto affixed my signature.

THEODOR RICHTER. 

